Certified Applicator(s):Corgill Construction, of Hackett, Arkansas, has been serving municipalities, professional engineering firms and contractors for five years, specializing in manhole rehabilitation and leak locating of sewer lines.

Condition of Structure(s):
The condition of the 25 manholes was very poor with severe deterioration resulting in infiltration of ground water and structural instability.

Size/Cost:
25 manholes

Description of Application:
Beginning in mid-2015, Corgill Construction, a Raven Certified Applicator, rehabilitated more than 25 manholes that had been deteriorating severely.

After cleaning and preparing the surface of the manholes, Corgill spray-applied a cementitious product to repair the lost substrate. Once the cement was allowed to cure and prepare, a 100% solids epoxy primer, the Raven 171, was applied to reduce the amount of off-gassing that could result in pinholes/holidays through the top coat. Raven 405, a 100% solids, ultra-high-build epoxy protective coating, was then applied at 125 mils thick to provide further structural reinforcement and corrosion protection.